109) Which one of the following abbreviations is used to specify an acme thread ?

Answer is:

Tr60X9

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Related Lathe MCQ - Machinist(Set-1) with Answers

110) 'V' grooves of cast iron pulley have to be fine turned. Which one of the following work holding methods gives the highest concentricity ?

Answer is:

holding on cone mandrel and machining between centres

111) To get a fine even surface on a workpiece by facing operation on lathe, it is necessary to have

Answer is:

high cutting speed, fine feed and light depth of cut

Explanation:

Facing Operation. Facing is the process of removing metal from the end of a workpiece to produce a flat surface. Most often, the workpiece is cylindrical, but using a 4-jaw chuck you can face rectangular or odd-shaped work to form cubes and other non-cylindrical shapes.

To get a fine even surface on a workpiece by facing operation on lathe, it is necessary to have

112) The included angle of the countersinking portion of a centre drill of type 'B' used for protecting the centre hole is

Answer is:

120 Degree

113) A spindle sleeve is to be assembled to the spindle nose to perform specific operations on a lathe. These sleeves have

Answer is:

External and internal Morse tapers

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